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kifflom [539]
4 years ago
11

which statement about elements is false? A. the same kind of atom exist in an element B. there are about 1000 elements found in

nature C. some elements have been made in laboratories D. Zinc, Copper,and Iron are elements
Chemistry
2 answers:
Alina [70]4 years ago
4 0
D is the answer
hope it helps!
Svetach [21]4 years ago
3 0
D
<span>Zinc, Copper,and Iron are elements

</span>
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HELP PLEASEEE <br>it's for an exam on monday​
zhannawk [14.2K]

From the stoichiometry of the reaction, we can see that the volume of carbon monoxide reacted is 44.8 L.

<h3>What is stoichiometry?</h3>

Stoichiometry is used to obtain the amount of substance reacted or the amount of product formed.

Number of moles of CO2 in 88g = 88g/4 g/mol = 2 moles

Molar mass of carbon monoxide = 12 + 16 = 28g/mol

We can see that 1 mole of oxygen was used in the reaction hence the mass of oxygen used is 32 g/mol. Given the stoichiometry of the reaction, 28g of carbon monoxide was burned.

If 1 mole of a gas occupies 22.4 L

2 moles of a gas occupies 2 moles  * 22.4 L/1 mole

= 44.8 L

Learn more about stoichiometry:brainly.com/question/9743981

#SPJ1

4 0
3 years ago
Calculate the volume of a cube with links to 2.2 in.
vlada-n [284]

Answer:

10.65

Explanation:

3 0
3 years ago
What term describes gas that is compressed into a smaller space than it would normally occupy at Earth's surface?
Aloiza [94]

Pressurized gas is the term that is used to describe a gas that is compressed into a smaller space than it would normally occupy at Earth's surface.

Explanation:

The purpose of compressing a gas is to lessen its volume so that it can fit in a small space. Natural gas can be compressed using a compressor and the pressure of a compressed gas is 200 to 250 bars.

Pressurized gases are used in ground processing and space flight operations.  Pressurized gas, also known as compressed gas is also used in fuel production and in gas pipelines.

When stored in a reservoir, care must be taken to avoid leakage as these gases compressed under high pressure are highly flammable.

8 0
3 years ago
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?
LuckyWell [14K]

Answer:

The mass of sodium hydroxide will result in the same mass of sodium chloride.

The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water

The mass of hydrochloric acid will result in the same mass of sodium chloride.

The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water

Explanation:

7 0
3 years ago
How is enthalpy used to predict whether a reaction is endothermic or exothermic? when the enthalpy of the reactants is higher th
mafiozo [28]
When the enthalpy change of the reaction is positive the reaction is endothermic
this means that the reaction is absorbing energy from the surrounding to the vessel
8 0
3 years ago
Read 2 more answers
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